风荷载作用下气膜模板变形的数值仿真模拟
Numerical Simulation of Deformation of Inflatable Membrane Formwork under Wind Load
摘要: 随着我国异形结构建筑的不断发展，充气膜结构作为一种创新的模板体系，已逐步应用于施工领域。相较于传统的模板体系，气膜模板具备成本低、施工周期短、安全性能高等优势。然而，由于其自身刚度较低，施工过程中易受到外荷载影响而产生变形，造成混凝土结构成形后带有初始缺陷，降低使用寿命。本文主要考虑膜材的材料特性是否为线性对变形的影响，运用ANSYS有限元分析软件，计算4~6级风荷载作用下气膜模板的变形，对比材料特性不同时结构的变形差异。结果显示，在风荷载作用下，膜材剪切模量的非线性特征不可忽略，风荷载越小，剪切模量非线性对变形的影响越明显；当风荷载达到6级时，结构变形超出合理线形范围，应当停止或暂缓施工。
Abstract: With the continuous development of special-shaped structures in China, inflatable membrane structure, as an innovative formwork system, has been gradually applied in the construction field. Compared with the traditional formwork system, the inflatable membrane formwork has the advantages of low cost, short construction period and high safety performance. However, due to its low rigidity, it is easy to be affected by external loads during construction, resulting in initial defects after the concrete structure is formed and reduced service life. This paper mainly considers whether the material properties of the membrane are linear on the deformation, using ANSYS finite element analysis software, calculates the deformation of the inflatable membrane formwork under the action of 4~6 wind loads, and compares the deformation difference of the structure with different material characteristics. The results show that the nonlinear characteristics of shear modulus can not be ignored under wind load, the effect of shear modulus nonlinearity on deformation becomes more obvious with the gradual reduction of wind load. When the wind load reaches level 6, the structure deformation exceeds the reasonable shape range, and the construction should be stopped or suspended.
文章引用：杨斌, 郭晓, 凌雨. 风荷载作用下气膜模板变形的数值仿真模拟[J]. 建模与仿真, 2024, 13(4): 4395-4404. https://doi.org/10.12677/mos.2024.134397

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